Bus Éireann routes 14, 40 and 271 offer the possibility of bussing it between Farranfore and Kerry Airport and vice versa -
timetable of current services here.
The disadvantages are that the buses come from further afield so could sometimes be delayed and the stop is not at Farranfore rail station but around 200 metres down the road.
On the plus side the adult single fare is €1.90 and the bus stops right outside the Airport terminal.
No substitute of course for a dedicated shuttle bus using the station yard but felt the Bus Éireann services were worth mentioning.